Alchemical bomb

Lore & Background

Alchemy in this world is a licensed trade, not a wild art. Guild-registered alchemists compound reagents—sulfur, saltpeter, rendered tallow, powdered quartz, and a host of lesser-known botanicals—into stable mixtures that remain inert until a catalyst is introduced. The bomb is the most common delivery format: a thick-walled glass or clay sphere no larger than a fist, sealed with wax and a slow-burning fuse. Cheaper variants use a hair-trigger impact pin, making them ideal for tossing into tight warrens where a lit fuse would singe the user's fingers.

The Goblin Slayer's world is one where monsters breed in caves, cellars, and abandoned ruins in numbers that make a single sword-draw feel like a losing proposition. Alchemical bombs fill the gap between a lone blade and a full sorcerous fireball. A party of four low-rank adventurers clearing a goblin nest in a flooded cellar might spend a third of their weekly pay on six or eight bombs, tossing them into side-tunnels to flush out the pack before the Swordsman finishes the stragglers with steel. It is ugly, imprecise work, and the smoke lingers for hours, but it keeps people alive.

Higher-grade alchemical bombs—those with a timed delay, a wider radius, or a corrosive rather than incendiary payload—command a premium and are often reserved for mid-rank parties tackling orc dens or cave-dwelling wyverns. The Goblin Slayer himself is known to prefer his own hand-built fire-traps and pit-falls for precision, but he has been seen carrying a small pouch of impact-pins for emergencies: a goblin that leaps onto his back in a narrow corridor, a slime that splashes across a bridge, a cave-in that needs to be triggered from a distance.

In Their Own Story

The cellar stank of wet fur and old blood. Sera, a second-rank Priestess with a chipped holy symbol, counted the six glass spheres in her leather pouch and tried not to think about the price tag. Behind her, the Swordsman—no title, just a scarred man in a battered breastplate—was already wedging a log across the narrow stairwell. "Two in the left tunnel, two in the right, two by the back wall," he said, not looking up. "You light them. I'll hold the door."

She pulled the first fuse free. The wick hissed, a thin ribbon of orange crawling toward the wax seal. She rolled it into the left tunnel, where a wet clicking sound—goblin teeth on a bone—stopped mid-chew. Three seconds. Four. The glass shattered with a crack like a knuckle hitting a table, and a bloom of blue-white flame swallowed the tunnel mouth. The screaming was brief. The second bomb she tossed with a shaking hand, and the third, and the fourth, each one a small, ugly answer to a question she did not want to ask with a sword.

When the smoke cleared, the Swordsman stepped over a pile of charred hides and picked up a single, intact glass sphere from the rubble. He turned it over in his calloused palm, then tucked it into his own pouch. "Good," he said, and walked out into the grey afternoon rain.

Reader's Guide

COMBAT USE: An alchemical bomb is a single-target-area denial tool. Toss it into a confined space (tunnel, cellar, goblin warren) and step back. The detonation produces a 2–4 metre radius of flame, shrapnel, or corrosive splash depending on the reagent blend. It does not kill a high-rank monster outright but will stagger, burn, or flush it, buying your Swordsman or Priestess the seconds needed to finish the job. Against goblins, orcs, and slimes it is devastating; against a cave wyvern or a high-level demon it is a distraction at best.

COST & CRAFTING: A standard impact-pin bomb costs a small fraction of a low-rank party's weekly pay. A timed-fuse variant costs roughly double. Alchemists who craft them work from a base of sulfur, saltpeter, and a binding agent; a competent alchemist can produce a batch of six in a single working day, but the reagents themselves are the expensive part. You will not find these in a goblin's hoard; you will find them in a guild supply shop or a caravan merchant's trunk.

FIELD NOTES (Goblin Slayer's kit): The Goblin Slayer carries a small leather pouch with three to four impact-pin bombs tucked between his trap-kit straps. He does not rely on them. His primary tools are hand-dug pit-falls, oil-soaked torches, and a network of trip-wires strung with sharpened stakes. The bombs are his "one bad night" insurance: a goblin that scales a wall he didn't expect, a slime that splashes across a narrow bridge, a cave-in that needs to be triggered from twenty paces. He keeps them in a padded sleeve so they do not crack against his breastplate, and he never lights a fuse with his bare fingers. The strap that holds the pouch is doubled leather, stitched at the throat, because a bomb rolling out of a torn pouch in a goblin warren is a bomb going off in a goblin warren with you still inside it.

COUNTER-STRATEGY (monsters): Goblins and orcs are highly vulnerable to area denial; a single bomb in a warren entrance can collapse the tunnel or flush the pack into the open. Slimes are dissolved by the corrosive splash variant. Cave-dwelling wyverns will retreat from the blast but are not killed; follow up with a fire-trap or a sorcerous bolt. A high-level demon or a boss-tier monster will shrug off a single bomb; use three or four in rapid succession to stagger it before your melee party closes in.

Did You Know?

• In the Goblin Slayer world, alchemy is a guild-licensed trade; unlicensed reagent mixing can result in a fine or worse, and the guild keeps a registry of registered alchemists and their workshop locations.
• The Goblin Slayer's preference for hand-built fire-traps and pit-falls over ready-made explosives reflects a practical philosophy: a trap you build yourself is a trap you understand, and a goblin warren is not a place fo
• Alchemical bombs are single-use and volatile in heat; adventurers in southern or volcanic regions are advised to store them in a shaded, ventilated pouch rather than a sealed leather satchel.
• The impact-pin variant (no lit fuse) was developed specifically for narrow-cave and cellar combat, where a burning wick would singe the user's hand or ignite nearby oil-soaked torches.